摘要
在微波场作用下快速合成了CaS :Eu2 +红色荧光体 ,用X射线粉末衍射 (XRD)分析证实它们是立方晶相 ,用扫描电镜 (SEM )观察了Eu2 +各种掺杂浓度下CaS :Eu2 +微晶的形貌及其粒径 ,测定了它们的荧光光谱和荧光衰减曲线。系统地探讨了Eu2
In this paper, the phosphors with CaS as the host and doped with Eu2+ ion were synthesized in a microwave field at the first time. The influence of the different concentrations of Eu2+ ion on fluorescent properties of the phosphors CaS: Eu2+ was discussed. The experimental results of SEM show that the crystallite structures of the CaS: Eu2+ with different shapes (such as cubic, spherical and rod) and different crystal sizes (100-1500 nm), for example, nano-scale, submicron-scale or micron-scale can be obtained when doping different concentrations of Eu2+ ion. The fluorescent intensity of the sphere phosphor CaS:Eu2+ is the strongest under the excitation at 254 nm.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2001年第3期304-307,共4页
Spectroscopy and Spectral Analysis
基金
广东省自然科学基金!(960 0 78号 )
北京大学稀土材料化学及应用国家重点实验室基金资助项目
